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Analog Devices Inc. LTC4380HMS-2#WTRPBF
- Part No.:
- LTC4380HMS-2#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-2#WTRPBF.pdf
- Description:
- L Q C SURGE STOPPER
- Quantity:
- Payment:
- Shipping:
Inventory:5,492
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Product details
Overview
LTC4380HMS-2#WTRPBF from Analog Devices is a low-quiescent-current surge stopper IC that controls an external N-channel MOSFET to protect downstream loads from automotive load dump, reverse input, overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, –40°C to 125°C extended temperature range, and AEC-Q100 qualification for automotive use.
For engineers reviewing the LTC4380HMS-2#WTRPBF datasheet, LTC4380HMS-2#WTRPBF pinout, LTC4380HMS-2#WTRPBF application, or LTC4380HMS-2#WTRPBF equivalent, key selection criteria include gate clamp voltage configurability, fault retry behavior (auto-retry vs latch-off), MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60V, and compatibility with high-side N-MOSFET configurations in battery-powered systems.
Technical Context
The LTC4380HMS-2#WTRPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via ΔVSNS) to dynamically shorten turn-off time under high MOSFET power dissipation. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, while dual gate clamp options (31.5V/50V to GND) enable output clamping at ~27V or ~45V respectively.
It supports auto-retry fault recovery (LTC4380-2 variant), with cool-down cycling between 1.215V and 3.4V on TMR, and includes reverse input protection down to –60V, ON-pin undervoltage detection (1.05V threshold), and adjustable turn-on delay (5ms typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive systems and industrial rails |
| Quiescent Current | 8µA typical - enables always-on battery backup and low-power wake-up circuits |
| Gate Clamp Options | 31.5V or 50V (SEL pin selectable) - sets output clamp at ~27V or ~45V for 12V/24V systems |
| Fault Behavior | Auto-retry (LTC4380-2) - cycles TMR between 1.215V–3.4V for thermal recovery before restart |
| Reverse Input Protection | –60V - eliminates need for external Schottky diode in reverse-battery scenarios |
| Current Limit Threshold | 50mV (rising), 62mV (severe short) - sets precise ILOAD = ΔVSNS/RSNS with adaptive stress response |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for under-hood automotive and industrial environments |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad (GND), rated for θJA = 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRN | VDS sense input | Tracks OUT; current through RDRN proportional to MOSFET VDS for stress-accelerated timing |
| GATE | N-MOSFET gate driver | 20µA charge pump regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) |
| SNS | Current sense input | Monitors ΔVSNS across sense resistor; controls gate to hold 50mV/62mV limit |
| OUT | Output voltage sense | Reference for GATE regulation and SNS differential; requires ≥22µF local bypass |
| VCC | Supply input | 4V–72V operation; withstands –60V reverse; protected by Zener or RC filter above 80V |
| ON | Enable/UV detect input | 1.05V threshold; open-drain compatible; pulls part into 6µA shutdown when <0.99V |
| FLT | Fault indicator output | Open-drain logic low during fault; sinks up to 3mA; signals active overvoltage/overcurrent |
| SEL | Gate clamp select | GND = 31.5V clamp; VCC/OUT = 50V clamp - configures output clamp for 12V or 24V systems |
| TMR | Fault timer capacitor node | Integrates multiplier current; triggers FLT and GATE off at 1.215V; controls auto-retry cool-down |
| GND | Device ground | Reference for all analog circuitry; exposed pad must be connected to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables direct connection to vehicle battery without parasitic drain concerns in always-on modules |
| Auto-retry fault recovery (LTC4380-2) | Prevents system lockout during transient surges; allows automatic restoration after thermal recovery |
| Reverse input protection to –60V | Eliminates external series diode, reducing voltage drop, heat, and BOM count in reverse-battery designs |
| MOSFET stress acceleration | TMR current scales with VDS × ID, shortening fault timeout under high power dissipation to protect SOA |
| AEC-Q100 qualified H-grade | Validated for automotive under-hood operation (–40°C to +125°C ambient) with full reliability reporting |
Applications
| Automotive Load Dump Protection | High-Side Battery Switch |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS ECUs from 12V system load dump transients up to 250Vpk. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side switch; clamps output to 27V using 31.5V gate clamp (SEL = GND). Use Value: Prevents damage to downstream 28V-rated components without requiring oversized TVS diodes or derated DC/DC converters. | Use Scenario: Enabling controlled power-up of telematics modules directly from vehicle battery with reverse polarity immunity. IC Role / Device Role / Timing Role: High-side N-MOSFET controller with –60V reverse input tolerance and 5ms soft-start via GATE ramp control. Use Value: Replaces Schottky diode + discrete FET solution, eliminating 0.3–0.5V forward drop and associated heat generation. |
| Industrial Power Sequencing | Avionic Hot-Swap Interface |
Use Scenario: Safely inserting field-replaceable modules into live 24V/48V backplanes without supply disturbance or arcing. IC Role / Device Role / Timing Role: Inrush-limited high-side switch with programmable current limit (50mV/62mV) and auto-retry fault handling. Use Value: Limits peak inrush to <1A during hot-swap, avoids brownout of shared rail, and recovers automatically after transient overload. | Use Scenario: Providing surge-protected, fault-resilient power to mission-critical avionics sensors in aircraft 28V DC systems. IC Role / Device Role / Timing Role: AEC-Q100-compliant surge stopper with 50V gate clamp (SEL = VCC) limiting output to ~45V during transients. Use Value: Meets DO-160 Section 22 Level 3 surge requirements while maintaining continuous operation via auto-retry behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HDD-2#WTRPBF | Same functionality and specs, but in 3mm × 3mm DFN package (θJA = 43°C/W vs MSOP's 160°C/W) | Better thermal performance in space-constrained layouts; requires different PCB footprint and reflow profile | Select for higher power density or improved thermal management; verify layout clearance for exposed pad soldering |
| LTC4381HMS-2#WTRPBF | Includes integrated 100mΩ N-MOSFET; removes need for external FET but limits max current to 3.5A and max VIN to 40V | Reduces BOM count and layout area; not suitable for >40V or >3.5A applications | Select when system current ≤3.5A and input ≤40V; tradeoff is lower flexibility and higher on-resistance vs discrete FET choice |
Compared with LTC4380HMS-2#WTRPBF, the DFN variant offers superior thermal resistance for high-duty-cycle surge events, while the LTC4381 integrates the MOSFET to simplify design at the cost of voltage/current scalability and thermal customization.
Availability
LTC4380HMS-2#WTRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, high-side battery switching, and industrial hot-swap applications requiring stable component supply, AEC-Q100 compliance, and extended temperature operation.
Supply support for LTC4380HMS-2#WTRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and aerospace markets.
The LTC4380 product line delivers robust, low-quiescent-current surge protection for safety-critical and always-on systems, specifically engineered for automotive load dump, reverse battery, and hot-swap resilience in harsh environments.
FAQ
What is the gate clamp voltage configuration for LTC4380HMS-2#WTRPBF?
The LTC4380HMS-2#WTRPBF supports two fixed gate clamp voltages: 31.5V (when SEL is tied to GND) and 50V (when SEL is tied to VCC or OUT). This selects output clamping at approximately 27V or 45V respectively, optimized for 12V and 24V/28V automotive systems. The LTC4380HMS-2#WTRPBF does not support externally adjustable clamping - that function is reserved for LTC4380-3/-4 variants.
Does LTC4380HMS-2#WTRPBF support auto-retry or latch-off fault behavior?
LTC4380HMS-2#WTRPBF implements auto-retry fault behavior (LTC4380-2 variant). Upon overvoltage or overcurrent fault, it enters a cool-down phase where the TMR pin cycles between 1.215V and 3.4V 15 times before discharging to 100mV and automatically restarting. This differs from latch-off versions (LTC4380-1/-3), which require ON pin reset or power cycle. Auto-retry ensures system resilience against transient surges without manual intervention.
What is the maximum reverse input voltage tolerance of LTC4380HMS-2#WTRPBF?
The LTC4380HMS-2#WTRPBF supports reverse input protection down to –60V on the VCC pin, enabling direct connection to vehicle battery without external reverse-polarity protection diodes. This capability eliminates forward voltage drop and associated power loss, making it ideal for always-on automotive modules where efficiency and thermal management are critical. The –60V rating applies with ON and SEL pins either open or biased within their absolute maximum ranges.
How does the TMR pin current scale with MOSFET stress in LTC4380HMS-2#WTRPBF?
In LTC4380HMS-2#WTRPBF, the TMR pin current is generated by an internal multiplier that scales with both VDS (sensed at DRN) and ID (derived from ΔVSNS). This causes the fault timer to accelerate proportionally to MOSFET power dissipation (VDS × ID), shortening the timeout period during severe faults. As a result, the device enforces stricter safe operating area (SOA) compliance than fixed-timer solutions, protecting the external FET under sustained overload or high-voltage transients.
Is LTC4380HMS-2#WTRPBF qualified for automotive applications?
Yes, LTC4380HMS-2#WTRPBF is AEC-Q100 qualified for automotive applications (Grade H, –40°C to +125°C ambient). It is manufactured under controlled automotive processes, with full reliability reports available from Analog Devices. The "#W" suffix denotes automotive-grade qualification, including enhanced ESD, HTOL, and temperature cycling validation - making it suitable for under-hood, body control, and ADAS power management systems.
LTC4380HMS-2#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4380HMS-2#WTRPBF FAQ
1.How can I place an order for LTC4380HMS-2#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-2#WTRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC4380HMS-2#WTRPBF reliable?
The price and inventory of LTC4380HMS-2#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4380HMS-2#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-2#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-2#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-2#WTRPBF?
LTC4380HMS-2#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-2#WTRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC4380HMS-2#WTRPBF?
For technical support, including LTC4380HMS-2#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-2#WTRPBF requirements.
6.How does Aetrix verify that LTC4380HMS-2#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-2#WTRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC4380HMS-2#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-2#WTRPBF?
All LTC4380HMS-2#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-2#WTRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC4380HMS-2#WTRPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-2#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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